Invention Grant
- Patent Title: Vacuum molding of thermoset sheet articles
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Application No.: US14764393Application Date: 2014-01-29
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Publication No.: US10471668B2Publication Date: 2019-11-12
- Inventor: Probir Kumar Guha , Mayur S. Shah , Kim Robert Hamner
- Applicant: CONTINENTAL STRUCTURAL PLASTICS, INC.
- Applicant Address: US MI Auburn Hills
- Assignee: Continental Structural Plastics Inc.
- Current Assignee: Continental Structural Plastics Inc.
- Current Assignee Address: US MI Auburn Hills
- Agency: Blue Filament Law PLLC
- Agent Avery N. Goldstein
- International Application: PCT/US2014/013595 WO 20140129
- International Announcement: WO2014/120767 WO 20140807
- Main IPC: B29C70/46
- IPC: B29C70/46 ; B29C43/02 ; B29C43/36 ; B29C43/58 ; B29C43/56 ; B29L31/00 ; B29L31/30 ; B29C43/50 ; B29K105/12 ; B29K101/10 ; B29K105/08

Abstract:
A process of compression molding an article from a curable resin is provided that includes opening a mold to an open position by displacing an upper die having an upper mold surface from a lower die having a lower mold surface. Resin is placed a mold surface and the dies are closed to an intermediate start position at a rate of from 1 to 10 cm/sec. The dies are then closed to a start position at a rate of between 25 and 60% of the rate of closure to the intermediate position. A shroud volume is evacuated for at least 3 seconds to a reduced pressure of less than 0.16 atmospheres while continuing to press toward a mold cavity volume at a rate of between 12 and 30% of the rate of closure to the intermediate start. The reduced pressure is removed as the full compression is applied.
Public/Granted literature
- US20150360425A1 VACUUM MOLDING OF THERMOSET SHEET ARTICLES Public/Granted day:2015-12-17
Information query
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